Device for temporarily connecting elevator cars to the hoisting cables



Feb. 28, 1928,

J. E. EVANS DEVICE FOR TEMPORARILY CONNECTING ELEVATOR CARS TO THE} HOISTING CABLES Filed April 15. 1926 2 Sheets-Sheet l Feb. 28, 1928.

J. E. EVANS DEVICE FOR TEMPORARILY CONNECTING ELEVATOR CARS TO THE HOISTING CABLES Filed April 1 1926 2 Sheets-Shae. 2

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Patented Pa. 28, 1928.

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Application filed April 15, 1926.; seriai'no. 102,103.

In the "0 eration ofelevator cars such as are used for transferring.passengers and freight from one floorof a building to an other, and of the type in which the car is suspended bya set of wire hoistingcables, usually about sixin. number, passing at the top of the elevator shaft over a grooved pulley, the car commonly being balanced by a counterweight and the cables attached to any suitable power-driven hoisting mechanism, it is occasionally necessary to mstallja new.ca-.

ble to replace one which isdamaged or worn, or to install a new set of cables. It has heretofore been common practice, when installing a new cable,sor set of cables, to hang the car with heavy chain blocksfiat the top of the elevatorhshaft and block the counterweights ofthe carat. the bottom. This makes it impossible to move the car until the new installation has been completcilitate such a replacement or installation of new cables, and to avoidtlie disadvantages of the old methods heretofore employed.

My invention consists in the novel arrangement and combination of associated parts and members of the device through which the objects of my invention: are attained,the essential elements thereof being more particularly pointed out in the appended claims. In the accompanying drawing, Figure 1 illustrates 1ny' novel connecting device in side elevation; Fig. 2 is an elevation of the same viewed at, right anglesto the position shown in Fig. 1; Fig. 3 is a detail, showing in plan the construction and arrangement of a clamping block, used to clamp the elevator cables to a clamping bar forming a portion of the device; Fig. 4 is a side. view of a simplifiedand modified form of my invention,

and Fig. 5 is a side elevationof another modified form r of my, invention.

The same reference characters indicate the same'parts in all the figures'of the drawing.

are clamped tothe bar on one side and three a on the other, this arrangement being employed to enable clamping membersof ample size and strength to be used.

In the present instance the suspension screws 2 are formed with right and left threads which at the upper end ofthe bars cooperate with screw-threaded blocks Glengaging the lower ends of pairs of links 7 which'are pivotedtothe ends of the bar 1. Thelower ends of: thesuspension screws cooperate with similar screw-threaded blocks 8 engaging links 9 which are anchored in a suitable manner to the car, as by means of the cross-pins 10 passing through the orificed lower ends of the links and engagin the channel beams 11, or other structura members of the car; y

The suspension screws are: rotated, to' cause the car to befdrawn upwardly towards the bar or to lower it by means of a pair of similar operating devices, one associated with each screw. Each of these devices con-p sists of awirame 12, oriticed to receive the associated screw, between the upper and lower sideslof which is arranged aibevel pinion 13 secured to the screw and engaged by a second bevel pinion 14 fixed to a shaft which is journaled in the side member of the frame andis equipped with an operating handle 15 by. which it may be rotated. The proximate sides of the frame are connected by overlapping bars 16-46, severallyattached to the two frames and arranged to be adjustably secured together as by means of the clamping screw 16. Any tendency of the frames to rotate with the suspension screws '2 isthus overcome, while theiadjustment of the connecting bars enables the devices as a whole to be turned (with the connected suspension screws) so that the axesof the operating as s handles will be parallel with the bars, own, or stand at right angles thereto,

with the handles on whichever side may be most convenient for operation in the particular case.

The manner .in which my, connecting de-' vice is employed will be easily understood from the description of their construction abovegiven. The lower ends of the two suspension screws are anchored to the car, and the clamps carried by the clamping bar all applied and tightened to clamp the group of cables to the bar. The screws are then operated to take the weight of thecar off their points of attachment to the car and slacken the portion of such cables belowthe clamping bar. The new cable to. be installed is then attached to the cablezto be removed, and the new cable then pulled into place and clamped to the clampingbar and also secured to the counterweight. This operation may be repeated to install another new cable, and so on until all are installed, if it is desiredto install-an entire set.

It will be observed that at all times the car is suspended by the cables and it may therefore safely be moved if convenience should require. .Moreover the work of changing the cables maybe done at any position of the carin the elevator shaft, and it has been found to be sometimes convenient to make :a change whileholding the car at such distance below a given floor that boards for the workmen to stand upon may be supported by the floor and the connecting bars '16.

In Fig. 4 I have shown a simplified form of my invention in which a .pair of central turnbuckle members 17,:each making screwthreaded engagement with a pair of right and left suspension screw =members 18-18 connected respectively to thecar and one end of the clamping bar, are used for the .pur- :pose of connecting 'the clamping bar to the car i .In Fig. 5 I have shown another modified 'form' of my invention in which a pair of operating devices are arranged to be simul- =taneously operated by a sin le operating handle. This construction is similar to that shown in Figs. 1 and 2, but differs in that the bevel pinion 13 secured to :the suspension screw 2-which is associated with such particular device and rotated by connection with thefhandle, also meshes with another bevel pinion l9 securedto. one end of. a shaft .ZOjournaledinthe frame of such device and extending acrossto asimilar bearing'in the frame-of the other device, the other end of the shaft beingequipped with abevel pinion 21 arranged to mesh with abevel pinion 18 secured to-the other suspension screw 2, the

I claim: 1-. A connecting device for "temporarily connecting elevator cars to a set of hoisting cables by which the car is suspended including a clamping bar equipped with a lurality of clamps arranged to individually e engaged with the members of said set of cables above their point of permanent connection'with car connecting members connected to the ends of said clamping bar and arranged to be detaehably anchoredto the car, and means for changing the extensionof said connecting members. I

Q. A connecting device. for temporarily connecting elevator cars to a set of hoisting cables by which thecar is suspended -in-. cluding a clamping bar equipped witlraplurality of clampsarranged to individually be engaged with the members of said set-of cables above their point of permanent connection with car and connecting means -in-. cluding suspension screws severally con? nected to opposite ends of said clampin'gzbar and detachably connected'tothe car at-their lower ends, said screws ebeing arranged to vary the length ofthe-suspension; Y

3. A connecting device for temporarily connecting elevator cars'toaset of hoisting cables by which the car issuspended including a clamping bar equipped with a plurality of clamps arranged .to individually be engaged with the members of saidset of cables above their point of permanent connection wlth car, a pairofsuspension screws having'right andleft threads, upperscrewthreaded'blocks engaged by said screws and connected with the opposite ends of :said clamping bar, lower screw-threaded blocks engaged by said screws andarr-anged 'to'ibe detachably connected with said car, and

means for rotating saidscrews.

4. A connecting device according to claim 3 in which said upper andlower screwthreaded blocks are flexibly :connectedfby link members to the clamping bar and car respectively. 5. A connecting device accordingrto claim 3 in which the means for rotating each suspension screw comprises a frame, a pinion rotatably mounted in said frame andsecured to theparticularscrew, and a second pinion meshing with said first mentioned pinion and secured to a shaftequipped with a crank handle.

-6. A connecting device according-to claim 3 in which the means forv rotating-each'suspension screw comprises a frame, a pinion rotatably mounted in said frameand secured to the particular screw, and'a second pinion meshing with said first mentioned gpinion and secured to a shaft equip edwith a crank handle,the two frames eing connected together by a bar extending between 7 them.

'7. A connecting deviceaccorclingtoclaim 3 in which the means for rotating each suspension screw comprises a frame, a pinion rotatably mounted in said frame and secured to the particular screw, and a second pinion meshing with said first-mentioned pinion and secured to a shaft equipped with a crank handle, the two frames being adjustably connected together by an extensible bar.

8. A connecting device according to claim 1 in which said clamps are arranged in tWo groups in different planes and in staggered arrangement. V

9. A connecting device according to claim 1 in which said clamps each consist of a grooved block arranged to seat upon the particular cable and a U-shaped bolt passing JOSEPH E. EVANS. 

